A novel compact coplanar filter

Paillot, T.; Blondy, Pierre; Cros, Dominique; Guillon, P.

doi:10.1109/mwsym.2002.1012210

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…Coplanar waveguide (CPW) bandpass filters [1][2][3][4][5][6][7] have been extensively studied in the design of uniplanar microwave integrated circuits and subsystems. In [1,2], CPW capacitive or inductive gap structures were initially utilized as lumped coupling elements to make up the two initial half-wavelength (λ/2) CPW bandpass filters.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Asymmetric Parallel-coupled CPW for .LAMBDA./4 Bandpass Filters with Broad Rejection Band

Gao

2004

IEICE Electron. Express

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Asymmetric parallel-coupled coplanar waveguide (CPW) is originally characterized here as an equivalent unified K-inverter network. On a basis of our developed self-calibrated method of moments (MoM), the relevant network parameters are extracted to explicitly demonstrate the frequency-dependent coupling behavior with the 1 st zero coupling at the λ/2 length of overlapped section. By differentiating the coupled spaces and overlapped lengths, the two CPW coupling structures are dissimilarly constructed and utilized as the input/output excitation of a λ/4 CPW bandpass filter. Through allocating the two unequal zeros towards the spurious harmonic around 3λ/4, an improved two-stage λ/4 CPW filter is designed at 5.0 GHz. Optimized results achieve broad rejection band, ranging from 5.8 GHz beyond 18.0 GHz, as verified by the ADS simulation.

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Section: Introductionmentioning

confidence: 99%

Investigation on Asymmetric Parallel-coupled CPW for .LAMBDA./4 Bandpass Filters with Broad Rejection Band

Gao

2004

IEICE Electron. Express

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“…Since the electric field is maximal at the center of each resonator, the maximum frequency shift is achieved by loading the tunable capacitors at this position. The filter is fed by original feedlines (Paillot et al, 2002): the first part is a 50- line connected to a wider shortcircuited line. The filter does not need bridges with this feeding structure and the external quality factor can be easily optimized.…”

Section: Wwwintechopencommentioning

confidence: 99%

Electronically Tunable Ferroelectric Devices for Microwave Applications

Courrèges¹,

Zhao²,

Choi³

et al. 2010

Microwave and Millimeter Wave Technologies From Photonic Bandgap Devices to Antenna and Applications

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“…Since the electric field is maximal at the middle of the resonators, a maximum frequency shift can be achieved by loading tunable capacitors at this position. The filter is fed by original feedlines [12]: the first part is a 50 line connected to a wider short circuited line. With this feeding structure, the filter does not need bridges, and the external quality factor, , can be optimized easily by modifying the length , and the width .…”

Section: Filter Designmentioning

confidence: 99%

A Ka-Band Electronically Tunable Ferroelectric Filter

Courrèges

Li²,

Zhao³

et al. 2009

IEEE Microw. Wireless Compon. Lett.

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This letter presents a three-pole tunable Ka-band coplanar filter that includes six high-Q BST ferroelectric capacitors. It tunes from 29 GHz up to 34 GHz (17%) with low bias voltages ranging from 0 V to 30 V. The filter has fractional bandwidths of 9.5-12.2%. It has a good insertion loss for this category of Ka-band ferroelectric filters, which is between 6.9 dB (0 V) and 2.5 dB (30 V). Two tone measurements showed that the filter has a minimum OIP3 of 15 dBm between 0 V and 30 V. The highest OIP3 value is 26 dBm achieved at a dc bias of 30 V.Index Terms-Barium strontium titanate (BST).

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A novel compact coplanar filter

Cited by 9 publications

References 9 publications

Investigation on Asymmetric Parallel-coupled CPW for .LAMBDA./4 Bandpass Filters with Broad Rejection Band

Investigation on Asymmetric Parallel-coupled CPW for .LAMBDA./4 Bandpass Filters with Broad Rejection Band

Electronically Tunable Ferroelectric Devices for Microwave Applications

A Ka-Band Electronically Tunable Ferroelectric Filter

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